-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * Copyright(c) 2014 6WIND S.A.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation.
+ * Copyright(c) 2014 6WIND S.A.
*/
#include <stdio.h>
#include <inttypes.h>
#include <sys/queue.h>
+#include <rte_compat.h>
+#include <rte_bus.h>
#include <rte_dev.h>
#include <rte_devargs.h>
#include <rte_debug.h>
-#include <rte_devargs.h>
#include <rte_log.h>
+#include <rte_spinlock.h>
+#include <rte_malloc.h>
#include "eal_private.h"
-/** Global list of device drivers. */
-static struct rte_driver_list dev_driver_list =
- TAILQ_HEAD_INITIALIZER(dev_driver_list);
+/**
+ * The device event callback description.
+ *
+ * It contains callback address to be registered by user application,
+ * the pointer to the parameters for callback, and the device name.
+ */
+struct dev_event_callback {
+ TAILQ_ENTRY(dev_event_callback) next; /**< Callbacks list */
+ rte_dev_event_cb_fn cb_fn; /**< Callback address */
+ void *cb_arg; /**< Callback parameter */
+ char *dev_name; /**< Callback device name, NULL is for all device */
+ uint32_t active; /**< Callback is executing */
+};
-/* register a driver */
-void
-rte_eal_driver_register(struct rte_driver *driver)
+/** @internal Structure to keep track of registered callbacks */
+TAILQ_HEAD(dev_event_cb_list, dev_event_callback);
+
+/* The device event callback list for all registered callbacks. */
+static struct dev_event_cb_list dev_event_cbs;
+
+/* spinlock for device callbacks */
+static rte_spinlock_t dev_event_lock = RTE_SPINLOCK_INITIALIZER;
+
+static int cmp_detached_dev_name(const struct rte_device *dev,
+ const void *_name)
{
- TAILQ_INSERT_TAIL(&dev_driver_list, driver, next);
+ const char *name = _name;
+
+ /* skip attached devices */
+ if (dev->driver != NULL)
+ return 1;
+
+ return strcmp(dev->name, name);
}
-/* unregister a driver */
-void
-rte_eal_driver_unregister(struct rte_driver *driver)
+static int cmp_dev_name(const struct rte_device *dev, const void *_name)
{
- TAILQ_REMOVE(&dev_driver_list, driver, next);
+ const char *name = _name;
+
+ return strcmp(dev->name, name);
}
-int
-rte_eal_vdev_init(const char *name, const char *args)
+int rte_eal_dev_attach(const char *name, const char *devargs)
{
- struct rte_driver *driver;
+ struct rte_bus *bus;
- if (name == NULL)
+ if (name == NULL || devargs == NULL) {
+ RTE_LOG(ERR, EAL, "Invalid device or arguments provided\n");
return -EINVAL;
+ }
- TAILQ_FOREACH(driver, &dev_driver_list, next) {
- if (driver->type != PMD_VDEV)
- continue;
+ bus = rte_bus_find_by_device_name(name);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Unable to find a bus for the device '%s'\n",
+ name);
+ return -EINVAL;
+ }
+ if (strcmp(bus->name, "pci") == 0 || strcmp(bus->name, "vdev") == 0)
+ return rte_eal_hotplug_add(bus->name, name, devargs);
- /*
- * search a driver prefix in virtual device name.
- * For example, if the driver is pcap PMD, driver->name
- * will be "eth_pcap", but "name" will be "eth_pcapN".
- * So use strncmp to compare.
- */
- if (!strncmp(driver->name, name, strlen(driver->name)))
- return driver->init(name, args);
+ RTE_LOG(ERR, EAL,
+ "Device attach is only supported for PCI and vdev devices.\n");
+
+ return -ENOTSUP;
+}
+
+int rte_eal_dev_detach(struct rte_device *dev)
+{
+ struct rte_bus *bus;
+ int ret;
+
+ if (dev == NULL) {
+ RTE_LOG(ERR, EAL, "Invalid device provided.\n");
+ return -EINVAL;
+ }
+
+ bus = rte_bus_find_by_device(dev);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find bus for device (%s)\n",
+ dev->name);
+ return -EINVAL;
}
- RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
- return -EINVAL;
+ if (bus->unplug == NULL) {
+ RTE_LOG(ERR, EAL, "Bus function not supported\n");
+ return -ENOTSUP;
+ }
+
+ ret = bus->unplug(dev);
+ if (ret)
+ RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
+ dev->name);
+ return ret;
}
-int
-rte_eal_dev_init(void)
+int __rte_experimental rte_eal_hotplug_add(const char *busname, const char *devname,
+ const char *devargs)
{
- struct rte_devargs *devargs;
- struct rte_driver *driver;
+ struct rte_bus *bus;
+ struct rte_device *dev;
+ struct rte_devargs *da;
+ int ret;
- /*
- * Note that the dev_driver_list is populated here
- * from calls made to rte_eal_driver_register from constructor functions
- * embedded into PMD modules via the PMD_REGISTER_DRIVER macro
- */
+ bus = rte_bus_find_by_name(busname);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
+ return -ENOENT;
+ }
- /* call the init function for each virtual device */
- TAILQ_FOREACH(devargs, &devargs_list, next) {
+ if (bus->plug == NULL) {
+ RTE_LOG(ERR, EAL, "Function plug not supported by bus (%s)\n",
+ bus->name);
+ return -ENOTSUP;
+ }
- if (devargs->type != RTE_DEVTYPE_VIRTUAL)
- continue;
+ da = calloc(1, sizeof(*da));
+ if (da == NULL)
+ return -ENOMEM;
+
+ ret = rte_devargs_parsef(da, "%s:%s,%s",
+ busname, devname, devargs);
+ if (ret)
+ goto err_devarg;
+
+ ret = rte_devargs_insert(da);
+ if (ret)
+ goto err_devarg;
+
+ ret = bus->scan();
+ if (ret)
+ goto err_devarg;
+
+ dev = bus->find_device(NULL, cmp_detached_dev_name, devname);
+ if (dev == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find unplugged device (%s)\n",
+ devname);
+ ret = -ENODEV;
+ goto err_devarg;
+ }
- if (rte_eal_vdev_init(devargs->virtual.drv_name,
- devargs->args)) {
- RTE_LOG(ERR, EAL, "failed to initialize %s device\n",
- devargs->virtual.drv_name);
- return -1;
+ ret = bus->plug(dev);
+ if (ret) {
+ RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n",
+ dev->name);
+ goto err_devarg;
+ }
+ return 0;
+
+err_devarg:
+ if (rte_devargs_remove(busname, devname)) {
+ free(da->args);
+ free(da);
+ }
+ return ret;
+}
+
+int __rte_experimental
+rte_eal_hotplug_remove(const char *busname, const char *devname)
+{
+ struct rte_bus *bus;
+ struct rte_device *dev;
+ int ret;
+
+ bus = rte_bus_find_by_name(busname);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
+ return -ENOENT;
+ }
+
+ if (bus->unplug == NULL) {
+ RTE_LOG(ERR, EAL, "Function unplug not supported by bus (%s)\n",
+ bus->name);
+ return -ENOTSUP;
+ }
+
+ dev = bus->find_device(NULL, cmp_dev_name, devname);
+ if (dev == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find plugged device (%s)\n", devname);
+ return -EINVAL;
+ }
+
+ ret = bus->unplug(dev);
+ if (ret)
+ RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
+ dev->name);
+ rte_devargs_remove(busname, devname);
+ return ret;
+}
+
+int __rte_experimental
+rte_dev_event_callback_register(const char *device_name,
+ rte_dev_event_cb_fn cb_fn,
+ void *cb_arg)
+{
+ struct dev_event_callback *event_cb;
+ int ret;
+
+ if (!cb_fn)
+ return -EINVAL;
+
+ rte_spinlock_lock(&dev_event_lock);
+
+ if (TAILQ_EMPTY(&dev_event_cbs))
+ TAILQ_INIT(&dev_event_cbs);
+
+ TAILQ_FOREACH(event_cb, &dev_event_cbs, next) {
+ if (event_cb->cb_fn == cb_fn && event_cb->cb_arg == cb_arg) {
+ if (device_name == NULL && event_cb->dev_name == NULL)
+ break;
+ if (device_name == NULL || event_cb->dev_name == NULL)
+ continue;
+ if (!strcmp(event_cb->dev_name, device_name))
+ break;
}
}
- /* Once the vdevs are initalized, start calling all the pdev drivers */
- TAILQ_FOREACH(driver, &dev_driver_list, next) {
- if (driver->type != PMD_PDEV)
- continue;
- /* PDEV drivers don't get passed any parameters */
- driver->init(NULL, NULL);
+ /* create a new callback. */
+ if (event_cb == NULL) {
+ event_cb = malloc(sizeof(struct dev_event_callback));
+ if (event_cb != NULL) {
+ event_cb->cb_fn = cb_fn;
+ event_cb->cb_arg = cb_arg;
+ event_cb->active = 0;
+ if (!device_name) {
+ event_cb->dev_name = NULL;
+ } else {
+ event_cb->dev_name = strdup(device_name);
+ if (event_cb->dev_name == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+ TAILQ_INSERT_TAIL(&dev_event_cbs, event_cb, next);
+ } else {
+ RTE_LOG(ERR, EAL,
+ "Failed to allocate memory for device "
+ "event callback.");
+ ret = -ENOMEM;
+ goto error;
+ }
+ } else {
+ RTE_LOG(ERR, EAL,
+ "The callback is already exist, no need "
+ "to register again.\n");
+ ret = -EEXIST;
}
+
+ rte_spinlock_unlock(&dev_event_lock);
return 0;
+error:
+ free(event_cb);
+ rte_spinlock_unlock(&dev_event_lock);
+ return ret;
}
-#ifdef RTE_LIBRTE_EAL_HOTPLUG
-int
-rte_eal_vdev_uninit(const char *name)
+int __rte_experimental
+rte_dev_event_callback_unregister(const char *device_name,
+ rte_dev_event_cb_fn cb_fn,
+ void *cb_arg)
{
- struct rte_driver *driver;
+ int ret = 0;
+ struct dev_event_callback *event_cb, *next;
- if (name == NULL)
+ if (!cb_fn)
return -EINVAL;
- TAILQ_FOREACH(driver, &dev_driver_list, next) {
- if (driver->type != PMD_VDEV)
+ rte_spinlock_lock(&dev_event_lock);
+ /*walk through the callbacks and remove all that match. */
+ for (event_cb = TAILQ_FIRST(&dev_event_cbs); event_cb != NULL;
+ event_cb = next) {
+
+ next = TAILQ_NEXT(event_cb, next);
+
+ if (device_name != NULL && event_cb->dev_name != NULL) {
+ if (!strcmp(event_cb->dev_name, device_name)) {
+ if (event_cb->cb_fn != cb_fn ||
+ (cb_arg != (void *)-1 &&
+ event_cb->cb_arg != cb_arg))
+ continue;
+ }
+ } else if (device_name != NULL) {
continue;
+ }
/*
- * search a driver prefix in virtual device name.
- * For example, if the driver is pcap PMD, driver->name
- * will be "eth_pcap", but "name" will be "eth_pcapN".
- * So use strncmp to compare.
+ * if this callback is not executing right now,
+ * then remove it.
*/
- if (!strncmp(driver->name, name, strlen(driver->name)))
- return driver->uninit(name);
+ if (event_cb->active == 0) {
+ TAILQ_REMOVE(&dev_event_cbs, event_cb, next);
+ free(event_cb);
+ ret++;
+ } else {
+ continue;
+ }
}
+ rte_spinlock_unlock(&dev_event_lock);
+ return ret;
+}
+
+void
+dev_callback_process(char *device_name, enum rte_dev_event_type event)
+{
+ struct dev_event_callback *cb_lst;
- RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
- return -EINVAL;
+ if (device_name == NULL)
+ return;
+
+ rte_spinlock_lock(&dev_event_lock);
+
+ TAILQ_FOREACH(cb_lst, &dev_event_cbs, next) {
+ if (cb_lst->dev_name) {
+ if (strcmp(cb_lst->dev_name, device_name))
+ continue;
+ }
+ cb_lst->active = 1;
+ rte_spinlock_unlock(&dev_event_lock);
+ cb_lst->cb_fn(device_name, event,
+ cb_lst->cb_arg);
+ rte_spinlock_lock(&dev_event_lock);
+ cb_lst->active = 0;
+ }
+ rte_spinlock_unlock(&dev_event_lock);
}
-#endif /* RTE_LIBRTE_EAL_HOTPLUG */
git.droids-corp.org / dpdk.git / blobdiff